Thanks for the work on IOCP,
I really appriecaite the efforts and will make use of
it.
I am an old UNIX hacker, and I am delivering a Windows
project with twisted.
I am about as far away from a windows programmer that you
can get.
I did have to get memory info from the Widows OS.
I was going to use C, but then I found ctypes and the
struct python C struct wrapper.
It was nice to have a python only solution.
As I was looking through the code in iocpcoreobject.c.
I noticed that most (maybe all) of the functionality could
be accessed by the ctypes module and the Struct package.
Being a newbie to windows programming, I am not comfortable
making the definitive statement that it should use this, and
elimintate the C code.
Instead I would like to ask the question. Does anyone see
a problem replacing the C code in iocpcoreobject.c with
a python module that leverages ctype.
I attached a simple python script that gets the memory from
a windows box using ctypes.
It would be very nice if no c compiler would be required to
install twisted IOCP reactor from CVS.
Thanks,
Mike
-------------------------------------------------------
#!/usr/bin/env python
# Simple WMI and ctypes example
# Michael Schnedier
import os
import time
import wmi
from ctypes import *
from ctypes.wintypes import *
import win32api
class MEMORYSTATUS(Structure):
_fields_ = [
('dwLength', DWORD),
('dwMemoryLoad', DWORD),
('dwTotalPhys', DWORD),
('dwAvailPhys', DWORD),
('dwTotalPageFile', DWORD),
('dwAvailPageFile', DWORD),
('dwTotalVirtual', DWORD),
('dwAvailVirtual', DWORD),
]
class ComputeNode:
def __init__(self):
self.memInfo = None
self.lastUpdate = time.time()
self.update()
def genMemoryXmlStringRep(self):
self.validate()
xmlString = \
"""<?xml version="1.0"?>
<MemoryInfo platform="windows"
TotalPhysicalMemory="%d"
AvailablePhysicalMemory="%d"
TotalPageFileSize="%d"
AvailPageFileSize="%d"
GetTotalVirtualMemory="%d"
GetAvailableVirtualMemory="%d"
/>
"""%( self.getTotalPhysicalMemory(),
self.getAvailPhysicalMemory(),
self.getTotalPageFileSize(),
self.getAvailPageFile(),
self.getTotalVirtualMemory(),
self.getAvailVirtualMemory())
return xmlString
def getTotalPhysicalMemory(self):
self.validate()
return self.memInfo.dwTotalPhys/1024/1024
def getAvailPhysicalMemory(self):
self.validate()
return self.memInfo.dwAvailPhys/1024/1024
def getTotalPageFileSize(self):
self.validate()
return self.memInfo.dwTotalPageFile/1024/1024
def getAvailPageFile(self):
self.validate()
return self.memInfo.dwAvailPageFile/1024/1024
def getTotalVirtualMemory(self):
self.validate()
return self.memInfo.dwTotalVirtual/1024/1024
def getAvailVirtualMemory(self):
self.validate()
return self.memInfo.dwAvailVirtual/1024/1024
def validate(self, deltaTrigger=60 ):
deltaTime = time.time() - self.lastUpdate
if (self.lastUpdate < 0) or (deltaTime > deltaTrigger):
self.update()
def update(self):
self.lastUpdate = time.time()
newStatus = MEMORYSTATUS()
windll.kernel32.GlobalMemoryStatus(byref(newStatus))
self.memInfo = newStatus
machineInfo = ComputeNode()
print machineInfo.genMemoryXmlStringRep()
Since
the C code seems to be a wrapper to COM services, and
registration of COM service I am curious
----------------------------------------------------------------
Michael Schneider
Senior Software Engineering Consultant
UGS PLM Solutions - an EDS Company
"The Greatest Performance Improvement Is the transitioning from a non-working state to the working state"
>